1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/arch/arm/mach-sa1100/generic.c 4 * 5 * Author: Nicolas Pitre 6 * 7 * Code common to all SA11x0 machines. 8 */ 9 #include <linux/gpio.h> 10 #include <linux/gpio/machine.h> 11 #include <linux/module.h> 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/delay.h> 15 #include <linux/dma-mapping.h> 16 #include <linux/pm.h> 17 #include <linux/cpufreq.h> 18 #include <linux/ioport.h> 19 #include <linux/platform_device.h> 20 #include <linux/reboot.h> 21 #include <linux/regulator/fixed.h> 22 #include <linux/regulator/machine.h> 23 #include <linux/irqchip/irq-sa11x0.h> 24 25 #include <video/sa1100fb.h> 26 27 #include <soc/sa1100/pwer.h> 28 29 #include <asm/div64.h> 30 #include <asm/mach/map.h> 31 #include <asm/mach/flash.h> 32 #include <asm/irq.h> 33 #include <asm/system_misc.h> 34 35 #include <mach/hardware.h> 36 #include <mach/irqs.h> 37 #include <mach/reset.h> 38 39 #include "generic.h" 40 #include <clocksource/pxa.h> 41 42 unsigned int reset_status; 43 EXPORT_SYMBOL(reset_status); 44 45 #define NR_FREQS 16 46 47 /* 48 * This table is setup for a 3.6864MHz Crystal. 49 */ 50 struct cpufreq_frequency_table sa11x0_freq_table[NR_FREQS+1] = { 51 { .frequency = 59000, /* 59.0 MHz */}, 52 { .frequency = 73700, /* 73.7 MHz */}, 53 { .frequency = 88500, /* 88.5 MHz */}, 54 { .frequency = 103200, /* 103.2 MHz */}, 55 { .frequency = 118000, /* 118.0 MHz */}, 56 { .frequency = 132700, /* 132.7 MHz */}, 57 { .frequency = 147500, /* 147.5 MHz */}, 58 { .frequency = 162200, /* 162.2 MHz */}, 59 { .frequency = 176900, /* 176.9 MHz */}, 60 { .frequency = 191700, /* 191.7 MHz */}, 61 { .frequency = 206400, /* 206.4 MHz */}, 62 { .frequency = 221200, /* 221.2 MHz */}, 63 { .frequency = 235900, /* 235.9 MHz */}, 64 { .frequency = 250700, /* 250.7 MHz */}, 65 { .frequency = 265400, /* 265.4 MHz */}, 66 { .frequency = 280200, /* 280.2 MHz */}, 67 { .frequency = CPUFREQ_TABLE_END, }, 68 }; 69 70 unsigned int sa11x0_getspeed(unsigned int cpu) 71 { 72 if (cpu) 73 return 0; 74 return sa11x0_freq_table[PPCR & 0xf].frequency; 75 } 76 77 /* 78 * Default power-off for SA1100 79 */ 80 static void sa1100_power_off(void) 81 { 82 mdelay(100); 83 local_irq_disable(); 84 /* disable internal oscillator, float CS lines */ 85 PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS); 86 /* enable wake-up on GPIO0 (Assabet...) */ 87 PWER = GFER = GRER = 1; 88 /* 89 * set scratchpad to zero, just in case it is used as a 90 * restart address by the bootloader. 91 */ 92 PSPR = 0; 93 /* enter sleep mode */ 94 PMCR = PMCR_SF; 95 } 96 97 void sa11x0_restart(enum reboot_mode mode, const char *cmd) 98 { 99 clear_reset_status(RESET_STATUS_ALL); 100 101 if (mode == REBOOT_SOFT) { 102 /* Jump into ROM at address 0 */ 103 soft_restart(0); 104 } else { 105 /* Use on-chip reset capability */ 106 RSRR = RSRR_SWR; 107 } 108 } 109 110 static void sa11x0_register_device(struct platform_device *dev, void *data) 111 { 112 int err; 113 dev->dev.platform_data = data; 114 err = platform_device_register(dev); 115 if (err) 116 printk(KERN_ERR "Unable to register device %s: %d\n", 117 dev->name, err); 118 } 119 120 121 static struct resource sa11x0udc_resources[] = { 122 [0] = DEFINE_RES_MEM(__PREG(Ser0UDCCR), SZ_64K), 123 [1] = DEFINE_RES_IRQ(IRQ_Ser0UDC), 124 }; 125 126 static u64 sa11x0udc_dma_mask = 0xffffffffUL; 127 128 static struct platform_device sa11x0udc_device = { 129 .name = "sa11x0-udc", 130 .id = -1, 131 .dev = { 132 .dma_mask = &sa11x0udc_dma_mask, 133 .coherent_dma_mask = 0xffffffff, 134 }, 135 .num_resources = ARRAY_SIZE(sa11x0udc_resources), 136 .resource = sa11x0udc_resources, 137 }; 138 139 static struct resource sa11x0uart1_resources[] = { 140 [0] = DEFINE_RES_MEM(__PREG(Ser1UTCR0), SZ_64K), 141 [1] = DEFINE_RES_IRQ(IRQ_Ser1UART), 142 }; 143 144 static struct platform_device sa11x0uart1_device = { 145 .name = "sa11x0-uart", 146 .id = 1, 147 .num_resources = ARRAY_SIZE(sa11x0uart1_resources), 148 .resource = sa11x0uart1_resources, 149 }; 150 151 static struct resource sa11x0uart3_resources[] = { 152 [0] = DEFINE_RES_MEM(__PREG(Ser3UTCR0), SZ_64K), 153 [1] = DEFINE_RES_IRQ(IRQ_Ser3UART), 154 }; 155 156 static struct platform_device sa11x0uart3_device = { 157 .name = "sa11x0-uart", 158 .id = 3, 159 .num_resources = ARRAY_SIZE(sa11x0uart3_resources), 160 .resource = sa11x0uart3_resources, 161 }; 162 163 static struct resource sa11x0mcp_resources[] = { 164 [0] = DEFINE_RES_MEM(__PREG(Ser4MCCR0), SZ_64K), 165 [1] = DEFINE_RES_MEM(__PREG(Ser4MCCR1), 4), 166 [2] = DEFINE_RES_IRQ(IRQ_Ser4MCP), 167 }; 168 169 static u64 sa11x0mcp_dma_mask = 0xffffffffUL; 170 171 static struct platform_device sa11x0mcp_device = { 172 .name = "sa11x0-mcp", 173 .id = -1, 174 .dev = { 175 .dma_mask = &sa11x0mcp_dma_mask, 176 .coherent_dma_mask = 0xffffffff, 177 }, 178 .num_resources = ARRAY_SIZE(sa11x0mcp_resources), 179 .resource = sa11x0mcp_resources, 180 }; 181 182 void __init sa11x0_ppc_configure_mcp(void) 183 { 184 /* Setup the PPC unit for the MCP */ 185 PPDR &= ~PPC_RXD4; 186 PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM; 187 PSDR |= PPC_RXD4; 188 PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); 189 PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); 190 } 191 192 void sa11x0_register_mcp(struct mcp_plat_data *data) 193 { 194 sa11x0_register_device(&sa11x0mcp_device, data); 195 } 196 197 static struct resource sa11x0ssp_resources[] = { 198 [0] = DEFINE_RES_MEM(0x80070000, SZ_64K), 199 [1] = DEFINE_RES_IRQ(IRQ_Ser4SSP), 200 }; 201 202 static u64 sa11x0ssp_dma_mask = 0xffffffffUL; 203 204 static struct platform_device sa11x0ssp_device = { 205 .name = "sa11x0-ssp", 206 .id = -1, 207 .dev = { 208 .dma_mask = &sa11x0ssp_dma_mask, 209 .coherent_dma_mask = 0xffffffff, 210 }, 211 .num_resources = ARRAY_SIZE(sa11x0ssp_resources), 212 .resource = sa11x0ssp_resources, 213 }; 214 215 static struct resource sa11x0fb_resources[] = { 216 [0] = DEFINE_RES_MEM(0xb0100000, SZ_64K), 217 [1] = DEFINE_RES_IRQ(IRQ_LCD), 218 }; 219 220 static struct platform_device sa11x0fb_device = { 221 .name = "sa11x0-fb", 222 .id = -1, 223 .dev = { 224 .coherent_dma_mask = 0xffffffff, 225 }, 226 .num_resources = ARRAY_SIZE(sa11x0fb_resources), 227 .resource = sa11x0fb_resources, 228 }; 229 230 void sa11x0_register_lcd(struct sa1100fb_mach_info *inf) 231 { 232 sa11x0_register_device(&sa11x0fb_device, inf); 233 } 234 235 void sa11x0_register_pcmcia(int socket, struct gpiod_lookup_table *table) 236 { 237 if (table) 238 gpiod_add_lookup_table(table); 239 platform_device_register_simple("sa11x0-pcmcia", socket, NULL, 0); 240 } 241 242 static struct platform_device sa11x0mtd_device = { 243 .name = "sa1100-mtd", 244 .id = -1, 245 }; 246 247 void sa11x0_register_mtd(struct flash_platform_data *flash, 248 struct resource *res, int nr) 249 { 250 flash->name = "sa1100"; 251 sa11x0mtd_device.resource = res; 252 sa11x0mtd_device.num_resources = nr; 253 sa11x0_register_device(&sa11x0mtd_device, flash); 254 } 255 256 static struct resource sa11x0ir_resources[] = { 257 DEFINE_RES_MEM(__PREG(Ser2UTCR0), 0x24), 258 DEFINE_RES_MEM(__PREG(Ser2HSCR0), 0x1c), 259 DEFINE_RES_MEM(__PREG(Ser2HSCR2), 0x04), 260 DEFINE_RES_IRQ(IRQ_Ser2ICP), 261 }; 262 263 static struct platform_device sa11x0ir_device = { 264 .name = "sa11x0-ir", 265 .id = -1, 266 .num_resources = ARRAY_SIZE(sa11x0ir_resources), 267 .resource = sa11x0ir_resources, 268 }; 269 270 void sa11x0_register_irda(struct irda_platform_data *irda) 271 { 272 sa11x0_register_device(&sa11x0ir_device, irda); 273 } 274 275 static struct resource sa1100_rtc_resources[] = { 276 DEFINE_RES_MEM(0x90010000, 0x40), 277 DEFINE_RES_IRQ_NAMED(IRQ_RTC1Hz, "rtc 1Hz"), 278 DEFINE_RES_IRQ_NAMED(IRQ_RTCAlrm, "rtc alarm"), 279 }; 280 281 static struct platform_device sa11x0rtc_device = { 282 .name = "sa1100-rtc", 283 .id = -1, 284 .num_resources = ARRAY_SIZE(sa1100_rtc_resources), 285 .resource = sa1100_rtc_resources, 286 }; 287 288 static struct resource sa11x0dma_resources[] = { 289 DEFINE_RES_MEM(DMA_PHYS, DMA_SIZE), 290 DEFINE_RES_IRQ(IRQ_DMA0), 291 DEFINE_RES_IRQ(IRQ_DMA1), 292 DEFINE_RES_IRQ(IRQ_DMA2), 293 DEFINE_RES_IRQ(IRQ_DMA3), 294 DEFINE_RES_IRQ(IRQ_DMA4), 295 DEFINE_RES_IRQ(IRQ_DMA5), 296 }; 297 298 static u64 sa11x0dma_dma_mask = DMA_BIT_MASK(32); 299 300 static struct platform_device sa11x0dma_device = { 301 .name = "sa11x0-dma", 302 .id = -1, 303 .dev = { 304 .dma_mask = &sa11x0dma_dma_mask, 305 .coherent_dma_mask = 0xffffffff, 306 }, 307 .num_resources = ARRAY_SIZE(sa11x0dma_resources), 308 .resource = sa11x0dma_resources, 309 }; 310 311 static struct platform_device *sa11x0_devices[] __initdata = { 312 &sa11x0udc_device, 313 &sa11x0uart1_device, 314 &sa11x0uart3_device, 315 &sa11x0ssp_device, 316 &sa11x0rtc_device, 317 &sa11x0dma_device, 318 }; 319 320 static int __init sa1100_init(void) 321 { 322 pm_power_off = sa1100_power_off; 323 324 regulator_has_full_constraints(); 325 326 return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices)); 327 } 328 329 arch_initcall(sa1100_init); 330 331 void __init sa11x0_init_late(void) 332 { 333 sa11x0_pm_init(); 334 } 335 336 int __init sa11x0_register_fixed_regulator(int n, 337 struct fixed_voltage_config *cfg, 338 struct regulator_consumer_supply *supplies, unsigned num_supplies, 339 bool uses_gpio) 340 { 341 struct regulator_init_data *id; 342 343 cfg->init_data = id = kzalloc(sizeof(*cfg->init_data), GFP_KERNEL); 344 if (!cfg->init_data) 345 return -ENOMEM; 346 347 if (!uses_gpio) 348 id->constraints.always_on = 1; 349 id->constraints.name = cfg->supply_name; 350 id->constraints.min_uV = cfg->microvolts; 351 id->constraints.max_uV = cfg->microvolts; 352 id->constraints.valid_modes_mask = REGULATOR_MODE_NORMAL; 353 id->constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS; 354 id->consumer_supplies = supplies; 355 id->num_consumer_supplies = num_supplies; 356 357 platform_device_register_resndata(NULL, "reg-fixed-voltage", n, 358 NULL, 0, cfg, sizeof(*cfg)); 359 return 0; 360 } 361 362 /* 363 * Common I/O mapping: 364 * 365 * Typically, static virtual address mappings are as follow: 366 * 367 * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.) 368 * 0xf4000000-0xf4ffffff: SA-1111 369 * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area) 370 * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above) 371 * 0xffff0000-0xffff0fff: SA1100 exception vectors 372 * 0xffff2000-0xffff2fff: Minicache copy_user_page area 373 * 374 * Below 0xe8000000 is reserved for vm allocation. 375 * 376 * The machine specific code must provide the extra mapping beside the 377 * default mapping provided here. 378 */ 379 380 static struct map_desc standard_io_desc[] __initdata = { 381 { /* PCM */ 382 .virtual = 0xf8000000, 383 .pfn = __phys_to_pfn(0x80000000), 384 .length = 0x00100000, 385 .type = MT_DEVICE 386 }, { /* SCM */ 387 .virtual = 0xfa000000, 388 .pfn = __phys_to_pfn(0x90000000), 389 .length = 0x00100000, 390 .type = MT_DEVICE 391 }, { /* MER */ 392 .virtual = 0xfc000000, 393 .pfn = __phys_to_pfn(0xa0000000), 394 .length = 0x00100000, 395 .type = MT_DEVICE 396 }, { /* LCD + DMA */ 397 .virtual = 0xfe000000, 398 .pfn = __phys_to_pfn(0xb0000000), 399 .length = 0x00200000, 400 .type = MT_DEVICE 401 }, 402 }; 403 404 void __init sa1100_map_io(void) 405 { 406 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc)); 407 } 408 409 void __init sa1100_timer_init(void) 410 { 411 pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x90000000)); 412 } 413 414 static struct resource irq_resource = 415 DEFINE_RES_MEM_NAMED(0x90050000, SZ_64K, "irqs"); 416 417 void __init sa1100_init_irq(void) 418 { 419 request_resource(&iomem_resource, &irq_resource); 420 421 sa11x0_init_irq_nodt(IRQ_GPIO0_SC, irq_resource.start); 422 423 sa1100_init_gpio(); 424 sa11xx_clk_init(); 425 } 426 427 /* 428 * Disable the memory bus request/grant signals on the SA1110 to 429 * ensure that we don't receive spurious memory requests. We set 430 * the MBGNT signal false to ensure the SA1111 doesn't own the 431 * SDRAM bus. 432 */ 433 void sa1110_mb_disable(void) 434 { 435 unsigned long flags; 436 437 local_irq_save(flags); 438 439 PGSR &= ~GPIO_MBGNT; 440 GPCR = GPIO_MBGNT; 441 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT; 442 443 GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ); 444 445 local_irq_restore(flags); 446 } 447 448 /* 449 * If the system is going to use the SA-1111 DMA engines, set up 450 * the memory bus request/grant pins. 451 */ 452 void sa1110_mb_enable(void) 453 { 454 unsigned long flags; 455 456 local_irq_save(flags); 457 458 PGSR &= ~GPIO_MBGNT; 459 GPCR = GPIO_MBGNT; 460 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT; 461 462 GAFR |= (GPIO_MBGNT | GPIO_MBREQ); 463 TUCR |= TUCR_MR; 464 465 local_irq_restore(flags); 466 } 467 468 int sa11x0_gpio_set_wake(unsigned int gpio, unsigned int on) 469 { 470 if (on) 471 PWER |= BIT(gpio); 472 else 473 PWER &= ~BIT(gpio); 474 475 return 0; 476 } 477 478 int sa11x0_sc_set_wake(unsigned int irq, unsigned int on) 479 { 480 if (BIT(irq) != IC_RTCAlrm) 481 return -EINVAL; 482 483 if (on) 484 PWER |= PWER_RTC; 485 else 486 PWER &= ~PWER_RTC; 487 488 return 0; 489 } 490